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1
5
6 package com.hp.hpl.jena.db.impl;
7
8 import com.hp.hpl.jena.graph.*;
9 import com.hp.hpl.jena.util.iterator.*;
10 import com.hp.hpl.jena.vocabulary.DB;
11
12 import java.text.SimpleDateFormat  ;
13 import java.util.*;
14
15
32 public class DBPropDatabase extends DBProp {
33
34
37
38 public static final Node_URI dbEngineType = (Node_URI)DB.engineType.getNode();
39 public static final Node_URI dbLayoutVersion = (Node_URI)DB.layoutVersion.getNode();
40 public static final Node_URI dbDriverVersion = (Node_URI)DB.driverVersion.getNode();
41 public static final Node_URI dbFormatDate = (Node_URI)DB.formatDate.getNode();
42 public static final Node_URI dbGraph = (Node_URI)DB.graph.getNode();
43 public static final Node_URI dbLongObjectLength = (Node_URI)DB.longObjectLength.getNode();
44 public static final Node_URI dbIndexKeyLength = (Node_URI)DB.indexKeyLength.getNode();
45 public static final Node_URI dbIsTransactionDb = (Node_URI)DB.isTransactionDb.getNode();
46 public static final Node_URI dbDoCompressURI = (Node_URI)DB.doCompressURI.getNode();
47 public static final Node_URI dbCompressURILength = (Node_URI)DB.compressURILength.getNode();
48 public static final Node_URI dbTableNamePrefix = (Node_URI)DB.tableNamePrefix.getNode();
49
50 public static final String dbSystemGraphName = "SystemGraph";
51
52 protected static SimpleDateFormat dateFormat = null;
53
54 public DBPropDatabase ( SpecializedGraph g, String engineType, String driverVersion,
55 String layoutVersion, String longObjectLength, String indexKeyLength,
56 String isTransactionDb, String doCompressURI, String compressURILength,
57 String tableNamePrefix ) {
58 super(g);
59
60 if( dateFormat == null ) {
61 dateFormat = new SimpleDateFormat ("yyyyMMdd'T'HHmmss'Z'");
63 dateFormat.setTimeZone( TimeZone.getTimeZone("GMT"));
64 }
65
66 String today = dateFormat.format( new Date());
67 if( engineType != null ) putPropString(dbEngineType, engineType);
68 if( driverVersion != null ) putPropString(dbDriverVersion, driverVersion);
69 putPropString(dbLayoutVersion, layoutVersion);
70 putPropString(dbFormatDate, today);
71 putPropString(dbLongObjectLength, longObjectLength);
72 putPropString(dbIndexKeyLength, indexKeyLength);
73 putPropString(dbIsTransactionDb, isTransactionDb);
74 putPropString(dbDoCompressURI, doCompressURI);
75 putPropString(dbCompressURILength, compressURILength);
76 putPropString(dbTableNamePrefix, tableNamePrefix);
77 }
78
79 public DBPropDatabase( SpecializedGraph g, Node n) {
80 super(g,n);
81 }
82
83 public DBPropDatabase( SpecializedGraph g) {
84 super(g,findDBPropNode(g));
85 }
86
87 public String getName() { return self.getURI(); }
88 public String getEngineType() { return getPropString( dbEngineType); }
89 public String getDriverVersion() { return getPropString( dbDriverVersion);}
90 public String getFormatDate() { return getPropString( dbFormatDate); }
91 public String getLayoutVersion() { return getPropString( dbLayoutVersion); }
92 public String getLongObjectLength() { return getPropString( dbLongObjectLength); }
93 public String getIndexKeyLength() { return getPropString( dbIndexKeyLength); }
94 public String getIsTransactionDb() { return getPropString( dbIsTransactionDb); }
95 public String getDoCompressURI() { return getPropString( dbDoCompressURI); }
96 public String getCompressURILength() { return getPropString( dbCompressURILength); }
97 public String getTableNamePrefix() { return getPropString( dbTableNamePrefix); }
98
99 public void addGraph( DBPropGraph g ) {
100 putPropNode( dbGraph, g.getNode() );
101 }
102
103 public void removeGraph( DBPropGraph g ) {
104 SpecializedGraph.CompletionFlag complete = newComplete();
105 ClosableIterator matches = graph.find( self, dbGraph, g.getNode(), complete);
106 if( matches.hasNext() ) {
107 graph.delete( (Triple)(matches.next()), complete );
108 g.remove();
109 matches.close();
110 }
111 }
112
113 public ExtendedIterator getAllGraphs() {
114 return
115 graph.find( self, dbGraph, null, newComplete() )
116 .mapWith( new MapToLSet() );
117 }
118
119 public ExtendedIterator getAllGraphNames() {
120 return getAllGraphs() .mapWith( graphToName );
121 }
122
123 static final Map1 graphToName = new Map1()
124 { public Object map1( Object o) { return ((DBPropGraph) o).getName(); } };
125
126 private class MapToLSet implements Map1 {
127 public Object map1( Object o) {
128 Triple t = (Triple) o;
129 return new DBPropGraph( graph, t.getObject() );
130 }
131 }
132
133 static Node findDBPropNode( SpecializedGraph g) {
134 ClosableIterator matches = g.find( null, dbEngineType, null, newComplete() );
135 if( matches.hasNext())
136 try { return ((Triple) matches.next()).getSubject(); }
137 finally { matches.close(); }
138 return null;
139 }
140 }
141
142 |
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